On 9/10/2021 7:38 AM, Alan Gauld via Python-list wrote:
But python complicates this tenet still further by adding an else
clause to its loops. And complicating this still more is that these
else clauses have almost exactly opposite effects.
To the contrary...
if...else
executes the else part if the condition is false.
while...else...
executes the else if the body of the loop does NOT get executed.
IE, executes the else part if the condition is false.
A while statement is, or can be viewed as, an if statement with a goto
ending the if part.
for...else...
executes the else iff ALL iterations of the for loop DO complete.
IE, executes the else part of the condition is false.
A for loop is, or can be viewed as syntactic sugar for a while loop.
The condition is that next(iterable) yields a value.
It is possible that the doc could be improved. I have not looked for a
while. Or maybe it needs to be read more.
--
Terry Jan Reedy
--
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